Her voice should be soft and calm. Also please dont give her a lisp. Not all snake-people pronounce their "s"s like ssssssssss. :>

Nira: an ex-angel who was also captured during a past war and made a royal servant. She serves Lillin in hell and becomes a trusted friend as well, but she had her tongue cut out, so her lines will mostly be a few small noises here and there and one scene where she hums a song.